/*
 * Copyright (c) 2010 Inside Secure, All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.opennfc.extension.nfc.api;

class Utils {

	/**
	 * Transform a byte array to hexa-decimal representation
	 * 
	 * @param array
	 *            Array to convert
	 * @return String representation
	 */
	public static final String toHexadecimal(final byte[] array) {
		if (array == null) {
			return "";
		}

		final StringBuilder builder = new StringBuilder(array.length * 3);

		for (final byte b : array) {
			builder.append(Integer.toHexString((b & 0xF0) >> 4));
			builder.append(Integer.toHexString(b & 0xF));
			builder.append(' ');
		}

		return builder.toString();
	}
}